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Place a hydrometer on the floor and measure the relative humidity around different parts of the house and compare. Forget the Moisture meter unless of course you are a surveyor!

You need to address WHY the concrete is wet first. Drainage, rising damp, water leaks, streams under property etc..

When did adequate surface water drainàge become part of building regs. Is there an obligation of owners or neighbours to dispose of surface water properly if it is affecting other properties in say a hamlet or terrace?

+1, bodger! The best way to do it is to do it yourself.

My floor also appears to have a copper gas pipe in the concrete. If I start hitting the floor with a breaker, am I correct in assuming the gas pipe is going to become unsafe, or how would you rate my chances of remiving the concrete around it without distorting the pipe?

I took out a chimney recently, and knocked out hearth to level the floor and filled the gap with a strong mortar. Since then I'm getting moisture rising up where the old hearth was. I can bash out the mortar, but what would you suggest to DPC the old hearth? How should it be sealed/dpced...

Bill, im not sure our 1900s houses were designed with 2013/14 weather in mind... Do the usual, check for water pipe leaks, bridged dpc, check drains etc.

Heres what i would do. Stud and insulate the studs. Leave an air gap between the stud. Ensure the gap behind the stud is ventailated on each wall with an airbrick at top an bottom. Board it out.

brick, air gap, frame/battens/celotex, foil backed plasterboard, waterproof tanking on wet areas, tiles. Extractor. Job done.

Im not so sure, interesting problem this. Laid a screed in the kitchen today at 4pm. 2hrs drying time. At 11.00pm it looked like this. Ok, its cornwall so i would expect it to dry in about 4hrs.. Looking from the breakfast room it looked like this. I checked out next doors property...

Update, checked inside the box before i powered up the ex and the fan was indeed wired not using the colours as expected... :)

Downstairs. The damp is next to an outside wall. No idea what's under it, but it is concrete. Wall doesn't seem to have rising damp, but it is a stone wall outside, from the 1880s, so no DPM. Outside wall also looks OK. I stuck the hydrometer on the floor, 80%. The room does suffer from damp in...

Can i run the hot water on my central heating combi boiler system when my central heating system is not pressured up ie drained down? Obviously the central heating will be switch off at this time. TIA,

I put two objects on a patch that was registering high levels on the hydrometer, and when I removed them it appears to have gone black (see pic) indicating damp is getting sucked up. Which would account for the high level on the hydro. Do you have suggestions for a course of action here? What...

Do you know where you can buy the Fball stuff? I believe they only sell it to contract fitters. It's great stuff though, if pricey.

I want to fit some vinyl floor over my concrete floor in the kitchen. Ive got most of the holes out using a mortar mix and ive cut some 6mm ply to underlay the floor. What should i use to stick the ply down? Some no more nails? Any one suggest anything better? Is it advisable to install some...

Ok, ELF I'll whip the front off of the ex before I power up. Cheers,